Washington — The top US military officer yesterday accused Pakistan’s intelligence agency of supporting Haqqani fighters in planning and conducting last week’s attack on the US Embassy in Kabul.

Adm. Mike Mullen, outgoing chairman of the Joint Chiefs of Staff, said Pakistani duplicity puts in jeopardy not only the frayed US-Pakistani partnership against terrorism but also the outcome of the decade-old war in Afghanistan.

Mullen said success in Afghanistan is threatened by the Pakistani government’s support for the Haqqani network of militants, which he called a “veritable arm” of Pakistan’s intelligence agency.

The remarks highlight a notable shift in the administration’s approach to Pakistan. Whereas US officials previously kept their strongest criticisms of Pakistan private, in recent days they have been explicit in linking the government to extremists who are attacking US forces in Afghanistan.